release: v0.3.16 — Linux ARM64 binary, multi-arch Docker, donate link

- Add linux-arm64 to PLATFORM_CHROMIUM_VERSIONS (Python + JS)
- Multi-arch Docker build (linux/amd64 + linux/arm64) via QEMU in CI
- Add ko-fi donate link to welcome banner (Python + JS)
- Version bump to 0.3.16

.github/FUNDING.yml

@@ -0,0 +1 @@
+ko_fi: cloakhq

.github/workflows/publish.yml

@@ -107,6 +107,7 @@ jobs:
         run: |
           VERSION=$(python -c 'import re; print(re.search(r"__version__\s*=\s*[\"'\'']([^\"'\'']+)", open("cloakbrowser/_version.py").read()).group(1))')
           echo "VERSION=$VERSION" >> $GITHUB_ENV
+      - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3
       - uses: docker/login-action@v3
         with:
@@ -117,6 +118,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             cloakhq/cloakbrowser:${{ env.VERSION }}

.gitignore

@@ -56,6 +56,9 @@ test-infra/
 # Website (deployed separately)
 site/
 
+# Browser profile manager (deployed separately)
+manager/
+
 # Release scripts
 publish.sh
 deploy.sh

CHANGELOG.md

@@ -6,6 +6,29 @@ Changes are tagged: **[wrapper]** for Python/JS wrapper, **[binary]** for Chromi
 
 ---
 
+## [0.3.16] — 2026-03-14
+
+- **[binary]** Linux arm64 build available — Raspberry Pi, AWS Graviton, Oracle Ampere now supported
+- **[wrapper]** Add donate link to first-launch welcome banner
+
+## [0.3.15] — 2026-03-13
+
+- **[binary]** Upgrade Linux build to 145.0.7632.159.7 — 33 source-level C++ patches
+- **[binary]** StorageBuckets API quota normalization — closes the last storage-based incognito detection vector
+- **[wrapper]** Fix non-ASCII character support in humanized typing — Cyrillic, CJK, and emoji now type correctly (thanks [@evelaa123](https://github.com/evelaa123))
+
+## [0.3.14] — 2026-03-12
+
+- **[binary]** Upgrade Linux build to 145.0.7632.159.6 — fix persistent context detection by FingerprintJS
+- **[binary]** Storage quota normalization for persistent context profiles
+- **[binary]** Fix outerHeight calculation for non-incognito contexts
+- **[wrapper]** Add CLI for binary management — `python -m cloakbrowser install` / `npx cloakbrowser install` with visible download progress (closes #43)
+
+## [0.3.13] — 2026-03-10
+
+- **[wrapper]** Suppress Playwright's `--enable-unsafe-swiftshader` default arg — eliminates SwiftShader software renderer detection signal, letting the binary's GPU spoofing work cleanly
+- **[binary]** Upgrade Linux build to 145.0.7632.159.5 — fix WebGPU adapter limits and features for NVIDIA profiles
+
 ## [0.3.12] — 2026-03-10
 
 - **[binary]** Upgrade Linux build to 145.0.7632.159.4

README.md

@@ -14,6 +14,10 @@
 <a href="https://hub.docker.com/r/cloakhq/cloakbrowser"><img src="https://img.shields.io/docker/pulls/cloakhq/cloakbrowser?label=docker&logo=docker&logoColor=white" alt="Docker Pulls"></a>
 </p>
 
+<p align="center">
+<a href="https://ko-fi.com/cloakhq"><img src="https://ko-fi.com/img/githubbutton_sm.svg" alt="Support on Ko-fi"></a>
+</p>
+
 <br>
 
 <h3 align="center">Stealth Chromium that passes every bot detection test.</h3>
@@ -36,7 +40,7 @@ Drop-in Playwright/Puppeteer replacement for Python and JavaScript.<br>
 Same API, same code — just swap the import. <strong>3 lines of code, 30 seconds to unblock.</strong>
 </p>
 
-- **32 source-level C++ patches** — canvas, WebGL, audio, fonts, GPU, screen, automation signals, CDP input behavior
+- **33 source-level C++ patches** — canvas, WebGL, audio, fonts, GPU, screen, automation signals, CDP input behavior
 - **`humanize=True`** — human-like mouse curves, keyboard timing, and scroll patterns. One flag, behavioral detection passes
 - **0.9 reCAPTCHA v3 score** — human-level, server-verified
 - **Passes Cloudflare Turnstile**, FingerprintJS, BrowserScan — tested against 30+ detection sites
@@ -110,13 +114,27 @@ page.goto("https://example.com")
 
 > ⭐ **Star** to show support — **[Watch releases](https://github.com/CloakHQ/CloakBrowser/subscription)** to get notified when new builds drop.
 
-## Latest: v0.3.12 (Chromium 145.0.7632.159.4)
+## Browser Profile Manager
+
+Self-hosted alternative to Multilogin, GoLogin, and AdsPower. Create browser profiles with unique fingerprints, proxies, and persistent sessions. Launch and interact with them in your browser via noVNC.
+
+```bash
+docker run -p 8080:8080 -v cloakprofiles:/data cloakhq/cloakbrowser-manager
+```
+
+Open [http://localhost:8080](http://localhost:8080). Create a profile. Click **Launch**. Done.
+
+→ **[CloakBrowser Manager](https://github.com/CloakHQ/CloakBrowser-Manager)** — free, open source (MIT)
+
+---
+
+## Latest: v0.3.15 (Chromium 145.0.7632.159.7)
 
 - **`humanize=True`** — one flag makes all mouse, keyboard, and scroll interactions behave like a real user. Bézier curves, per-character typing, realistic scroll patterns. Two presets: `default` and `careful`
 - **CDP input behavior mimicking** — input events sent via CDP now produce the same signals as real user interactions. 5 new source-level patches covering pointer, keyboard, and mouse behavior
 - **Native locale spoofing** — new C++ patch replaces detectable CDP-level locale emulation
 - **WebGPU fingerprint hardening** — adapter features, limits, and device ID spoofed for cross-API consistency
-- **32 fingerprint patches** (Linux x64) — all 4 platforms on Chromium 145
+- **33 fingerprint patches** (Linux x64) — all 4 platforms on Chromium 145
 - **Stealthy with zero flags** — binary auto-generates a random fingerprint seed at startup. No configuration required
 - **Timezone & locale from proxy IP** — `launch(proxy="...", geoip=True)` auto-detects timezone and locale
 - **Persistent profiles** — `launch_persistent_context()` keeps cookies and localStorage across sessions, bypasses incognito detection
@@ -203,7 +221,7 @@ CloakBrowser is a thin wrapper (Python + JavaScript) around a custom-built Chrom
 3. **Every launch** → Playwright or Puppeteer starts with our binary + stealth args
 4. **You write code** → standard Playwright/Puppeteer API, nothing new to learn
 
-The binary includes 32 source-level patches covering canvas, WebGL, audio, fonts, GPU, screen properties, hardware reporting, automation signal removal, and CDP input behavior mimicking.
+The binary includes 33 source-level patches covering canvas, WebGL, audio, fonts, GPU, screen properties, hardware reporting, automation signal removal, and CDP input behavior mimicking.
 
 These are compiled into the Chromium binary — not injected via JavaScript, not set via flags.
 
@@ -288,7 +306,7 @@ context.close()
 
 ### `launch_persistent_context()`
 
-Same as `launch_context()`, but with a persistent user profile. Cookies, localStorage, and cache persist across sessions. Also avoids incognito detection by services like BrowserScan.
+Same as `launch_context()`, but with a persistent user profile. Cookies, localStorage, and cache persist across sessions.
 
 Use this when you need to:
 - **Stay logged in** across runs (cookies/sessions survive restarts)
@@ -313,6 +331,28 @@ Supports all the same options as `launch_context()`: `proxy`, `user_agent`, `vie
 
 Async version: `launch_persistent_context_async()`.
 
+**Storage quota and detection tradeoff:** By default, the binary normalizes storage quota to pass FingerprintJS, which blocks persistent contexts that report non-incognito quota values. This means detection services that penalize incognito mode (like BrowserScan's `notPrivate` check, -10 points) will still flag it. If your target site penalizes incognito but doesn't use FingerprintJS, set a higher quota to appear as a regular profile:
+
+```python
+ctx = launch_persistent_context("./my-profile", args=["--fingerprint-storage-quota=5000"])
+```
+
+| Quota setting | FingerprintJS | BrowserScan `notPrivate` |
+|---|---|---|
+| Default (auto, ~500MB) | PASS | -10 (flagged as incognito) |
+| `--fingerprint-storage-quota=5000` | May trigger detection | PASS (appears non-incognito) |
+
+### CLI
+
+Pre-download the binary or check installation status from the command line:
+
+```bash
+python -m cloakbrowser install      # Download binary with progress output
+python -m cloakbrowser info         # Show version, path, platform
+python -m cloakbrowser update       # Check for and download newer binary
+python -m cloakbrowser clear-cache  # Remove cached binaries
+```
+
 ### Utility Functions
 
 ```python
@@ -528,6 +568,7 @@ Supported by the binary but **not set by default** — pass via `args` to custom
 | `--fingerprint-location` | Geolocation coordinates |
 | `--fingerprint-timezone` | Timezone (e.g. `America/New_York`) |
 | `--fingerprint-locale` | Locale (e.g. `en-US`) |
+| `--fingerprint-storage-quota` | Override storage quota in MB — affects `storage.estimate()`, `storageBuckets`, and legacy webkit APIs. Auto-normalized when `--fingerprint` is set |
 | `--fingerprint-taskbar-height` | Override taskbar height (binary defaults: Win=48, Mac=95, Linux=0) |
 | `--fingerprint-fonts-dir` | Path to cross-platform font directory |
 | `--enable-blink-features=FakeShadowRoot` | Access closed shadow DOM elements |
@@ -574,6 +615,7 @@ browser = launch(args=[
 | Platform | Chromium | Patches | Status |
 |---|---|---|---|
 | Linux x86_64 | 145 | 31 | ✅ Latest |
+| Linux arm64 (RPi, Graviton) | 145 | 31 | ✅ Latest |
 | macOS arm64 (Apple Silicon) | 145 | 26 | ✅ Latest |
 | macOS x86_64 (Intel) | 145 | 26 | ✅ Latest |
 | Windows x86_64 | 145 | 26 | ✅ Latest |
@@ -706,6 +748,15 @@ COPY your_script.py /app/
 CMD ["python", "your_script.py"]
 ```
 
+**Building your own image from pip** — use `python -m cloakbrowser install` to download the binary during build with visible progress:
+
+```dockerfile
+FROM python:3.12-slim
+RUN pip install cloakbrowser && python -m cloakbrowser install
+COPY your_script.py /app/
+CMD ["python", "/app/your_script.py"]
+```
+
 **Building from source** — a [`Dockerfile`](Dockerfile) is also included if you prefer to build your own image:
 
 ```bash
@@ -718,7 +769,9 @@ CloakBrowser works identically local, in Docker, and on VPS. No environment-spec
 
 ## Troubleshooting
 
-**Still getting blocked on aggressive sites (DataDome, Turnstile)?**
+---
+
+### Still getting blocked on aggressive sites (DataDome, Turnstile)?
 
 Some sites detect headless mode even with our C++ patches. Run in **headed mode** with a virtual display:
 
@@ -743,7 +796,9 @@ browser.close()
 
 This runs a real headed browser rendered on a virtual display — no physical monitor needed. Combined with a residential proxy, this passes even the most aggressive detection services. Datacenter IPs are often flagged by IP reputation regardless of browser fingerprint — a residential proxy makes the difference.
 
-**Sites challenge fresh sessions but work after first visit**
+---
+
+### Sites challenge fresh sessions but work after first visit
 
 Some sites challenge first-time visitors with no cookies over HTTP/2. This affects all Chromium browsers, not just CloakBrowser. Use a persistent profile to warm up cookies once, then reuse across sessions:
 
@@ -777,7 +832,10 @@ ctx = await launchPersistentContext({ userDataDir: './profile' });
 
 For stateless/ephemeral use cases, `launch(args=["--disable-http2"])` forces HTTP/1.1 which bypasses the check. Only use this flag for sites that require it — most work fine with HTTP/2.
 
-**Something not working? Make sure you're on the latest version**
+---
+
+### Something not working? Make sure you're on the latest version
+
 Older versions may use outdated stealth args or download an older binary:
 ```bash
 pip install -U cloakbrowser    # Python
@@ -785,13 +843,19 @@ npm install cloakbrowser@latest # JavaScript
 docker pull cloakhq/cloakbrowser:latest  # Docker
 ```
 
-**Binary download fails / timeout**
+---
+
+### Binary download fails / timeout
+
 Set a custom download URL or use a local binary:
 ```bash
 export CLOAKBROWSER_BINARY_PATH=/path/to/your/chrome
 ```
 
-**New update broke something? Roll back to the previous version**
+---
+
+### New update broke something? Roll back to the previous version
+
 Install a specific wrapper version to downgrade both the wrapper and the binary it downloads:
 ```bash
 pip install cloakbrowser==0.3.11              # Python
@@ -800,45 +864,47 @@ docker pull cloakhq/cloakbrowser:0.3.11       # Docker
 ```
 Each wrapper version pins its own binary version, so downgrading the wrapper automatically gets you the matching binary on next launch.
 
-**macOS: "App is damaged" or Gatekeeper blocks launch**
+---
+
+### macOS: "App is damaged" or Gatekeeper blocks launch
+
 The binary is ad-hoc signed. macOS quarantines downloaded files. Run once to clear it:
 ```bash
 xattr -cr ~/.cloakbrowser/chromium-*/Chromium.app
 ```
 
-**"playwright install" vs CloakBrowser binary**
+---
+
+### "playwright install" vs CloakBrowser binary
+
 You do NOT need `playwright install chromium`. CloakBrowser downloads its own binary. You only need Playwright's system deps:
 ```bash
 playwright install-deps chromium
 ```
 
-**macOS: Blocked on some sites that pass on Linux**
+---
+
+### macOS: Blocked on some sites that pass on Linux
 
 The macOS fingerprint profile has known inconsistencies that aggressive bot detection catches. If a site blocks you on macOS but works on Linux, switch to a Windows fingerprint profile by passing `stealth_args=False` and manually setting `--fingerprint-platform=windows` with matching GPU flags (see [Fingerprint Management](#fingerprint-management) for the full flag list).
 
-**Site detects incognito / private browsing mode**
+---
 
-By default, `launch()` opens an incognito context. Some sites (like BrowserScan) detect this. Use `launch_persistent_context()` instead — it runs with a real user profile, so incognito detection passes:
+### Site detects incognito / private browsing mode
+
+By default, `launch()` opens an incognito context. Some sites penalize this. Use `launch_persistent_context()` to get a real profile with cookie persistence:
 
 ```python
 from cloakbrowser import launch_persistent_context
 
 ctx = launch_persistent_context("./my-profile", headless=False)
-page = ctx.new_page()
 ```
 
-```javascript
-import { launchPersistentContext } from 'cloakbrowser';
+If the site still flags incognito, raise the storage quota to appear as a regular browsing session. See the [storage quota tradeoff](#launch_persistent_context) for details on how this affects different detection services.
 
-const ctx = await launchPersistentContext({
-  userDataDir: './my-profile',
-  headless: false,
-});
-```
+---
 
-This also gives you cookie and localStorage persistence across sessions.
-
-**reCAPTCHA v3 scores are low (0.1–0.3)**
+### reCAPTCHA v3 scores are low (0.1–0.3)
 
 Avoid `page.wait_for_timeout()` — it sends CDP protocol commands that reCAPTCHA detects. Use native sleep instead:
 
@@ -904,19 +970,26 @@ A: Yes. Pass `proxy="http://user:pass@host:port"` to `launch()`.
 - 🐛 **Bug reports & feature requests** — [GitHub Issues](https://github.com/CloakHQ/CloakBrowser/issues)
 - 📦 **PyPI** — [pypi.org/project/cloakbrowser](https://pypi.org/project/cloakbrowser/)
 - 📦 **npm** — [npmjs.com/package/cloakbrowser](https://www.npmjs.com/package/cloakbrowser)
+- ☕ **Support** — [ko-fi.com/cloakhq](https://ko-fi.com/cloakhq)
 - 📧 **Contact** — cloakhq@pm.me
 
 ## Security
 
-All binary releases are GPG-signed and include GitHub artifact attestations for supply chain verification.
+All releases are signed for supply chain verification.
 
 ```bash
-# Verify GPG signature
+# Verify GPG signature (binary release tag)
 gpg --keyserver keyserver.ubuntu.com --recv-keys C60C0DDC9D0DE2DD
-git verify-tag chromium-v145.0.7632.159.4
+git verify-tag chromium-v145.0.7632.159.7
 
-# Verify binary attestation
+# Verify GitHub binary attestation (Sigstore)
 gh attestation verify cloakbrowser-linux-x64.tar.gz --repo CloakHQ/cloakbrowser
+
+# Verify Docker image signature (Cosign/Sigstore)
+cosign verify \
+  --certificate-identity-regexp "https://github.com/CloakHQ/CloakBrowser/" \
+  --certificate-oidc-issuer "https://token.actions.githubusercontent.com" \
+  cloakhq/cloakbrowser:latest
 ```
 
 ## License

cloakbrowser/__main__.py

@@ -0,0 +1,111 @@
+"""CLI for cloakbrowser — download and manage the stealth Chromium binary.
+
+Usage:
+    python -m cloakbrowser install      # Download binary (with progress)
+    python -m cloakbrowser info         # Show binary version, path, platform
+    python -m cloakbrowser update       # Check for and download newer binary
+    python -m cloakbrowser clear-cache  # Remove cached binaries
+"""
+
+from __future__ import annotations
+
+import argparse
+import logging
+import sys
+
+
+def _setup_logging() -> None:
+    """Route cloakbrowser logger to stderr with clean output."""
+    logging.basicConfig(
+        level=logging.INFO,
+        format="%(message)s",
+        stream=sys.stderr,
+        force=True,
+    )
+    # Suppress noisy HTTP request logs from httpx
+    logging.getLogger("httpx").setLevel(logging.WARNING)
+
+
+def cmd_install(args: argparse.Namespace) -> None:
+    from .download import ensure_binary
+
+    path = ensure_binary()
+    print(path)
+
+
+def cmd_info(args: argparse.Namespace) -> None:
+    from .config import get_local_binary_override
+    from .download import binary_info
+
+    info = binary_info()
+    override = get_local_binary_override()
+
+    print(f"Version:   {info['version']}")
+    print(f"Platform:  {info['platform']}")
+    print(f"Binary:    {info['binary_path']}")
+    print(f"Installed: {info['installed']}")
+    print(f"Cache:     {info['cache_dir']}")
+    if override:
+        print(f"Override:  {override} (CLOAKBROWSER_BINARY_PATH)")
+
+
+def cmd_update(args: argparse.Namespace) -> None:
+    from .download import check_for_update
+
+    logger = logging.getLogger("cloakbrowser")
+    logger.info("Checking for updates...")
+    new_version = check_for_update()
+    if new_version:
+        print(f"Updated to Chromium {new_version}")
+    else:
+        print("Already up to date.")
+
+
+def cmd_clear_cache(args: argparse.Namespace) -> None:
+    from .config import get_cache_dir
+    from .download import clear_cache
+
+    if not get_cache_dir().exists():
+        print("No cache to clear.")
+        return
+    clear_cache()
+    print("Cache cleared.")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        prog="cloakbrowser",
+        description="Manage the CloakBrowser stealth Chromium binary.",
+    )
+    sub = parser.add_subparsers(dest="command")
+
+    sub.add_parser("install", help="Download the Chromium binary")
+    sub.add_parser("info", help="Show binary version, path, and platform")
+    sub.add_parser("update", help="Check for and download a newer binary")
+    sub.add_parser("clear-cache", help="Remove all cached binaries")
+
+    args = parser.parse_args()
+    if not args.command:
+        parser.print_help()
+        sys.exit(2)
+
+    _setup_logging()
+
+    commands = {
+        "install": cmd_install,
+        "info": cmd_info,
+        "update": cmd_update,
+        "clear-cache": cmd_clear_cache,
+    }
+
+    try:
+        commands[args.command](args)
+    except KeyboardInterrupt:
+        sys.exit(130)
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()

cloakbrowser/_version.py

@@ -1 +1 @@
-__version__ = "0.3.12"
+__version__ = "0.3.16"

cloakbrowser/browser.py

@@ -19,7 +19,7 @@ import os
 from typing import Any, Literal, TypedDict
 from urllib.parse import unquote, urlparse, urlunparse
 
-from .config import DEFAULT_VIEWPORT, get_default_stealth_args
+from .config import DEFAULT_VIEWPORT, IGNORE_DEFAULT_ARGS, get_default_stealth_args
 from .download import ensure_binary
 
 logger = logging.getLogger("cloakbrowser")
@@ -111,7 +111,7 @@ def launch(
         executable_path=binary_path,
         headless=headless,
         args=chrome_args,
-        ignore_default_args=["--enable-automation"],
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
         **_build_proxy_kwargs(proxy),
         **kwargs,
     )
@@ -194,7 +194,7 @@ async def launch_async(  # noqa: C901
         executable_path=binary_path,
         headless=headless,
         args=chrome_args,
-        ignore_default_args=["--enable-automation"],
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
         **_build_proxy_kwargs(proxy),
         **kwargs,
     )
@@ -305,7 +305,7 @@ def launch_persistent_context(
         executable_path=binary_path,
         headless=headless,
         args=chrome_args,
-        ignore_default_args=["--enable-automation"],
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
         **_build_proxy_kwargs(proxy),
         **context_kwargs,
     )
@@ -418,7 +418,7 @@ async def launch_persistent_context_async(
         executable_path=binary_path,
         headless=headless,
         args=chrome_args,
-        ignore_default_args=["--enable-automation"],
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
         **_build_proxy_kwargs(proxy),
         **context_kwargs,
     )

cloakbrowser/config.py

@@ -15,15 +15,24 @@ from ._version import __version__
 # CHROMIUM_VERSION is the latest across all platforms (for display/reference).
 # Use get_chromium_version() for the current platform's actual version.
 # ---------------------------------------------------------------------------
-CHROMIUM_VERSION = "145.0.7632.159.4"
+CHROMIUM_VERSION = "145.0.7632.159.7"
 
 PLATFORM_CHROMIUM_VERSIONS: dict[str, str] = {
-    "linux-x64": "145.0.7632.159.4",
+    "linux-x64": "145.0.7632.159.7",
+    "linux-arm64": "145.0.7632.159.7",
     "darwin-arm64": "145.0.7632.109.2",
     "darwin-x64": "145.0.7632.109.2",
     "windows-x64": "145.0.7632.109.2",
 }
 
+# ---------------------------------------------------------------------------
+# Playwright default args to suppress — these leak automation signals.
+# --enable-automation: exposes navigator.webdriver = true
+# --enable-unsafe-swiftshader: forces software WebGL rendering via SwiftShader,
+#   producing a distinctive renderer string that no real user browser has
+# ---------------------------------------------------------------------------
+IGNORE_DEFAULT_ARGS = ["--enable-automation", "--enable-unsafe-swiftshader"]
+
 # ---------------------------------------------------------------------------
 # Default stealth arguments passed to the patched Chromium binary.
 # These activate source-level fingerprint patches compiled into the binary.

cloakbrowser/download.py

@@ -60,6 +60,7 @@ def _show_welcome() -> None:
     print("  https://github.com/CloakHQ/CloakBrowser")
     print()
     print("  Issues?  https://github.com/CloakHQ/CloakBrowser/issues")
+    print("  Donate?  https://ko-fi.com/cloakhq")
     print("  Star us if CloakBrowser helps your project!")
     print()
     try:

cloakbrowser/human/keyboard.py

@@ -41,7 +41,15 @@ def _get_nearby_key(ch: str) -> str:
 
 def human_type(page: Any, raw: RawKeyboard, text: str, cfg: HumanConfig) -> None:
     for i, ch in enumerate(text):
-        # Mistype chance — press wrong key, notice, backspace, then correct
+        # Non-ASCII characters (Cyrillic, CJK, emoji) — use insertText
+        if not ch.isascii():
+            sleep_ms(rand_range(cfg.key_hold))
+            raw.insert_text(ch)
+            if i < len(text) - 1:
+                _inter_char_delay(cfg)
+            continue
+
+        # Mistype chance — only for ASCII alphanumeric
         if random.random() < cfg.mistype_chance and ch.isalnum():
             wrong = _get_nearby_key(ch)
             _type_normal_char(raw, wrong, cfg)

cloakbrowser/human/keyboard_async.py

@@ -22,7 +22,15 @@ class AsyncRawKeyboard(Protocol):
 
 async def async_human_type(page: Any, raw: AsyncRawKeyboard, text: str, cfg: HumanConfig) -> None:
     for i, ch in enumerate(text):
-        # Mistype chance — press wrong key, notice, backspace, then correct
+        # Non-ASCII characters (Cyrillic, CJK, emoji) — use insertText
+        if not ch.isascii():
+            await async_sleep_ms(rand_range(cfg.key_hold))
+            await raw.insert_text(ch)
+            if i < len(text) - 1:
+                await _inter_char_delay(cfg)
+            continue
+
+        # Mistype chance — only for ASCII alphanumeric
         if random.random() < cfg.mistype_chance and ch.isalnum():
             wrong = _get_nearby_key(ch)
             await _type_normal_char(raw, wrong, cfg)

js/README.md

@@ -11,7 +11,7 @@
 
 Drop-in Playwright/Puppeteer replacement. Same API, same code — just swap the import. **3 lines of code, 30 seconds to unblock.**
 
-- **32 source-level C++ patches** — canvas, WebGL, audio, fonts, GPU, screen, automation signals
+- **33 source-level C++ patches** — canvas, WebGL, audio, fonts, GPU, screen, automation signals
 - **0.9 reCAPTCHA v3 score** — human-level, server-verified
 - **Passes Cloudflare Turnstile**, FingerprintJS, BrowserScan — tested against 30+ detection sites
 - **`npm install cloakbrowser`** — binary auto-downloads, auto-updates, zero config
@@ -133,6 +133,17 @@ const browser = await launch({ proxy: 'http://proxy:8080', geoip: true, timezone
 
 > **Note:** For rotating residential proxies, the DNS-resolved IP may differ from the exit IP. Pass explicit `timezone`/`locale` in those cases.
 
+### CLI
+
+Pre-download the binary or check installation status from the command line:
+
+```bash
+npx cloakbrowser install      # Download binary with progress output
+npx cloakbrowser info         # Show version, path, platform
+npx cloakbrowser update       # Check for and download newer binary
+npx cloakbrowser clear-cache  # Remove cached binaries
+```
+
 ### Utilities
 
 ```javascript

js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "cloakbrowser",
-  "version": "0.3.12",
+  "version": "0.3.16",
   "description": "Stealth Chromium that passes every bot detection test. Drop-in Playwright/Puppeteer replacement with source-level fingerprint patches.",
   "type": "module",
   "main": "dist/index.js",
@@ -15,6 +15,9 @@
       "import": "./dist/puppeteer.js"
     }
   },
+  "bin": {
+    "cloakbrowser": "./dist/cli.js"
+  },
   "files": [
     "dist"
   ],

js/src/cli.ts

@@ -0,0 +1,97 @@
+#!/usr/bin/env node
+/**
+ * CLI for cloakbrowser — download and manage the stealth Chromium binary.
+ *
+ * Usage:
+ *   npx cloakbrowser install      # Download binary (with progress)
+ *   npx cloakbrowser info         # Show binary version, path, platform
+ *   npx cloakbrowser update       # Check for and download newer binary
+ *   npx cloakbrowser clear-cache  # Remove cached binaries
+ */
+
+import { ensureBinary, binaryInfo, checkForUpdate, clearCache } from "./download.js";
+import { getLocalBinaryOverride, getCacheDir } from "./config.js";
+import fs from "node:fs";
+
+const USAGE = `Usage: cloakbrowser <command>
+
+Commands:
+  install      Download the Chromium binary
+  info         Show binary version, path, and platform
+  update       Check for and download a newer binary
+  clear-cache  Remove all cached binaries`;
+
+async function cmdInstall(): Promise<void> {
+  const binaryPath = await ensureBinary();
+  console.log(binaryPath);
+}
+
+function cmdInfo(): void {
+  const info = binaryInfo();
+  const override = getLocalBinaryOverride();
+
+  console.log(`Version:   ${info.version}`);
+  console.log(`Platform:  ${info.platform}`);
+  console.log(`Binary:    ${info.binaryPath}`);
+  console.log(`Installed: ${info.installed}`);
+  console.log(`Cache:     ${info.cacheDir}`);
+  if (override) {
+    console.log(`Override:  ${override} (CLOAKBROWSER_BINARY_PATH)`);
+  }
+}
+
+async function cmdUpdate(): Promise<void> {
+  console.error("Checking for updates...");
+  const newVersion = await checkForUpdate();
+  if (newVersion) {
+    console.log(`Updated to Chromium ${newVersion}`);
+  } else {
+    console.log("Already up to date.");
+  }
+}
+
+function cmdClearCache(): void {
+  const cacheDir = getCacheDir();
+  if (!fs.existsSync(cacheDir)) {
+    console.log("No cache to clear.");
+    return;
+  }
+  clearCache();
+  console.log("Cache cleared.");
+}
+
+async function main(): Promise<void> {
+  const command = process.argv[2];
+
+  if (!command || command === "--help" || command === "-h") {
+    console.log(USAGE);
+    process.exit(command ? 0 : 2);
+  }
+
+  try {
+    switch (command) {
+      case "install":
+        await cmdInstall();
+        break;
+      case "info":
+        cmdInfo();
+        break;
+      case "update":
+        await cmdUpdate();
+        break;
+      case "clear-cache":
+        cmdClearCache();
+        break;
+      default:
+        console.error(`Unknown command: ${command}\n`);
+        console.log(USAGE);
+        process.exit(2);
+    }
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    console.error(`Error: ${message}`);
+    process.exit(1);
+  }
+}
+
+main();

js/src/config.ts

@@ -27,10 +27,11 @@ export { WRAPPER_VERSION };
 // CHROMIUM_VERSION is the latest across all platforms (for display/reference).
 // Use getChromiumVersion() for the current platform's actual version.
 // ---------------------------------------------------------------------------
-export const CHROMIUM_VERSION = "145.0.7632.159.4";
+export const CHROMIUM_VERSION = "145.0.7632.159.7";
 
 export const PLATFORM_CHROMIUM_VERSIONS: Record<string, string> = {
-  "linux-x64": "145.0.7632.159.4",
+  "linux-x64": "145.0.7632.159.7",
+  "linux-arm64": "145.0.7632.159.7",
   "darwin-arm64": "145.0.7632.109.2",
   "darwin-x64": "145.0.7632.109.2",
   "windows-x64": "145.0.7632.109.2",
@@ -188,6 +189,14 @@ export function getLocalBinaryOverride(): string | undefined {
   return process.env.CLOAKBROWSER_BINARY_PATH || undefined;
 }
 
+// ---------------------------------------------------------------------------
+// Playwright default args to suppress — these leak automation signals.
+// --enable-automation: exposes navigator.webdriver = true
+// --enable-unsafe-swiftshader: forces software WebGL rendering via SwiftShader,
+//   producing a distinctive renderer string that no real user browser has
+// ---------------------------------------------------------------------------
+export const IGNORE_DEFAULT_ARGS = ["--enable-automation", "--enable-unsafe-swiftshader"];
+
 // ---------------------------------------------------------------------------
 // Default stealth arguments
 // ---------------------------------------------------------------------------

js/src/download.ts

@@ -151,6 +151,7 @@ function showWelcome(): void {
   console.log("  https://github.com/CloakHQ/CloakBrowser");
   console.log();
   console.log("  Issues?  https://github.com/CloakHQ/CloakBrowser/issues");
+  console.log("  Donate?  https://ko-fi.com/cloakhq");
   console.log("  Star us if CloakBrowser helps your project!");
   console.log();
   try {
@@ -227,7 +228,8 @@ async function verifyDownloadChecksum(filePath: string, version?: string): Promi
   await verifyChecksum(filePath, expected);
 }
 
-async function fetchChecksums(version?: string): Promise<Map<string, string> | null> {
+/** @internal Exported for testing only. */
+export async function fetchChecksums(version?: string): Promise<Map<string, string> | null> {
   const v = version || getChromiumVersion();
   const hasCustomUrl = !!process.env.CLOAKBROWSER_DOWNLOAD_URL;
 

js/src/human/keyboard.ts

@@ -22,6 +22,11 @@ const NEARBY_KEYS: Record<string, string> = {
   '6': '57ty', '7': '68yu', '8': '79ui', '9': '80io', '0': '9p',
 };
 
+function isAscii(ch: string): boolean {
+  const code = ch.codePointAt(0);
+  return code !== undefined && code < 128;
+}
+
 function getNearbyKey(ch: string): string {
   const lower = ch.toLowerCase();
   if (lower in NEARBY_KEYS) {
@@ -38,11 +43,23 @@ export async function humanType(
   text: string,
   cfg: HumanConfig,
 ): Promise<void> {
-  for (let i = 0; i < text.length; i++) {
-    const ch = text[i];
+  const chars = [...text]; // Handle emoji surrogate pairs correctly
 
-    // Mistype chance — press wrong key, notice, backspace, then correct
-    if (Math.random() < cfg.mistype_chance && /[a-zA-Z0-9]/.test(ch)) {
+  for (let i = 0; i < chars.length; i++) {
+    const ch = chars[i];
+
+    // Non-ASCII characters (Cyrillic, CJK, emoji) — use insertText
+    if (!isAscii(ch)) {
+      await sleep(randRange(cfg.key_hold));
+      await raw.insertText(ch);
+      if (i < chars.length - 1) {
+        await interCharDelay(cfg);
+      }
+      continue;
+    }
+
+    // Mistype chance — only for ASCII alphanumeric
+    if (Math.random() < cfg.mistype_chance && /^[a-zA-Z0-9]$/.test(ch)) {
       const wrong = getNearbyKey(ch);
       await typeNormalChar(raw, wrong, cfg);
       await sleep(randRange(cfg.mistype_delay_notice));
@@ -60,7 +77,7 @@ export async function humanType(
       await typeNormalChar(raw, ch, cfg);
     }
 
-    if (i < text.length - 1) {
+    if (i < chars.length - 1) {
       await interCharDelay(cfg);
     }
   }

js/src/playwright.ts

@@ -5,7 +5,7 @@
 
 import type { Browser, BrowserContext } from "playwright-core";
 import type { LaunchOptions, LaunchContextOptions, LaunchPersistentContextOptions } from "./types.js";
-import { DEFAULT_VIEWPORT } from "./config.js";
+import { DEFAULT_VIEWPORT, IGNORE_DEFAULT_ARGS } from "./config.js";
 import { buildArgs } from "./args.js";
 import { ensureBinary } from "./download.js";
 import { parseProxyUrl } from "./proxy.js";
@@ -45,7 +45,7 @@ export async function launch(options: LaunchOptions = {}): Promise<Browser> {
     executablePath: binaryPath,
     headless: options.headless ?? true,
     args,
-    ignoreDefaultArgs: ["--enable-automation"],
+    ignoreDefaultArgs: IGNORE_DEFAULT_ARGS,
     ...(options.proxy
       ? { proxy: typeof options.proxy === "string" ? parseProxyUrl(options.proxy) : options.proxy }
       : {}),
@@ -163,7 +163,7 @@ export async function launchPersistentContext(
     executablePath: binaryPath,
     headless: options.headless ?? true,
     args,
-    ignoreDefaultArgs: ["--enable-automation"],
+    ignoreDefaultArgs: IGNORE_DEFAULT_ARGS,
     ...(options.proxy
       ? { proxy: typeof options.proxy === "string" ? parseProxyUrl(options.proxy) : options.proxy }
       : {}),

js/src/puppeteer.ts

@@ -5,6 +5,7 @@
 
 import type { Browser } from "puppeteer-core";
 import type { LaunchOptions } from "./types.js";
+import { IGNORE_DEFAULT_ARGS } from "./config.js";
 import { buildArgs } from "./args.js";
 import { ensureBinary } from "./download.js";
 import { parseProxyUrl } from "./proxy.js";
@@ -62,7 +63,7 @@ export async function launch(options: LaunchOptions = {}): Promise<Browser> {
     executablePath: binaryPath,
     headless: options.headless ?? true,
     args,
-    ignoreDefaultArgs: ["--enable-automation"],
+    ignoreDefaultArgs: IGNORE_DEFAULT_ARGS,
     ...options.launchOptions,
   });
 

js/tests/humanize.test.ts

@@ -530,6 +530,81 @@ function buildMockPage(overrides: Record<string, any> = {}): any {
   return page;
 }
 
+// =========================================================================
+// humanType non-ASCII
+// =========================================================================
+describe("humanType non-ASCII", () => {
+  function makeRawKeyboardMock() {
+    const downKeys: string[] = [];
+    const insertedChars: string[] = [];
+    const raw = {
+      down: vi.fn(async (k: string) => { downKeys.push(k); }),
+      up: vi.fn(async () => {}),
+      type: vi.fn(async () => {}),
+      insertText: vi.fn(async (t: string) => { insertedChars.push(t); }),
+    };
+    return { raw, downKeys, insertedChars };
+  }
+
+  it("types Cyrillic via insertText, not down", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, downKeys, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "Привет", cfg);
+
+    expect(insertedChars.join("")).toBe("Привет");
+    for (const k of downKeys) {
+      expect(k.charCodeAt(0)).toBeLessThan(128);
+    }
+  });
+
+  it("types mixed ASCII + Cyrillic correctly", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, downKeys, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "Hi Мир", cfg);
+
+    expect(downKeys).toContain("H");
+    expect(downKeys).toContain("i");
+    expect(insertedChars.join("")).toContain("М");
+    expect(insertedChars.join("")).toContain("и");
+    expect(insertedChars.join("")).toContain("р");
+  });
+
+  it("types CJK via insertText", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "你好", cfg);
+
+    expect(insertedChars.join("")).toBe("你好");
+  });
+
+  it("types emoji via insertText", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "Hi 👋", cfg);
+
+    expect(insertedChars.join("")).toContain("👋");
+  });
+
+  it("mistype only triggers for ASCII, not Cyrillic", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 1.0 });
+    const { raw, downKeys } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "AБ", cfg);
+
+    expect(downKeys).toContain("Backspace");
+  });
+});
+
+
 
 function buildMockFrame(): any {
   return {

js/tests/update.test.ts

@@ -14,6 +14,7 @@ import {
   checkWrapperUpdate,
   clearCache,
   ensureBinary,
+  fetchChecksums,
   getLatestChromiumVersion,
   parseChecksums,
   resetWrapperUpdateChecked,
@@ -269,6 +270,54 @@ describe("parseChecksums", () => {
   });
 });
 
+describe("download fallback", () => {
+  afterEach(() => {
+    vi.restoreAllMocks();
+    delete process.env.CLOAKBROWSER_DOWNLOAD_URL;
+  });
+
+  it("checksum fetch falls back to GitHub on primary 429", async () => {
+    const HASH =
+      "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
+    const checksumText = `${HASH}  cloakbrowser-${getPlatformTag()}.tar.gz`;
+
+    vi.spyOn(globalThis, "fetch").mockImplementation(async (input) => {
+      const url =
+        typeof input === "string"
+          ? input
+          : input instanceof URL
+            ? input.toString()
+            : (input as Request).url;
+      if (url.includes("cloakbrowser.dev")) {
+        return {
+          ok: false,
+          status: 429,
+          statusText: "Too Many Requests",
+        } as Response;
+      }
+      // GitHub fallback
+      return { ok: true, text: async () => checksumText } as Response;
+    });
+
+    const result = await fetchChecksums();
+    expect(result).not.toBeNull();
+    expect(
+      result!.has(`cloakbrowser-${getPlatformTag()}.tar.gz`)
+    ).toBe(true);
+  });
+
+  it("checksum fetch returns null when both sources fail", async () => {
+    vi.spyOn(globalThis, "fetch").mockResolvedValue({
+      ok: false,
+      status: 429,
+      statusText: "Too Many Requests",
+    } as Response);
+
+    const result = await fetchChecksums();
+    expect(result).toBeNull();
+  });
+});
+
 describe("effective version", () => {
   it("returns platform version when no marker exists", () => {
     // Default behavior — no marker file in test environment

pyproject.toml

@@ -58,6 +58,9 @@ geoip = ["geoip2>=4.0"]
 patchright = ["patchright>=1.40"]
 dev = ["pytest>=7.0", "pytest-asyncio>=0.23"]
 
+[project.scripts]
+cloakbrowser = "cloakbrowser.__main__:main"
+
 [project.urls]
 Homepage = "https://github.com/CloakHQ/CloakBrowser"
 Documentation = "https://github.com/CloakHQ/CloakBrowser#readme"

tests/test_humanize_unit.py

@@ -406,6 +406,127 @@ class TestSelectAllPlatform:
             assert _SELECT_ALL == "Control+a"
 
 
+# =========================================================================
+# 11. Non-ASCII keyboard input
+# =========================================================================
+
+class TestNonAsciiKeyboard:
+    def test_cyrillic_uses_insert_text(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        down_keys = []
+        inserted = []
+        raw.down = MagicMock(side_effect=lambda k: down_keys.append(k))
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock(side_effect=lambda t: inserted.append(t))
+
+        human_type(page, raw, "Привет", cfg)
+
+        assert "".join(inserted) == "Привет"
+        for k in down_keys:
+            assert ord(k[0]) < 128 or k in ("Shift", "Backspace")
+
+    def test_mixed_ascii_cyrillic(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        down_keys = []
+        inserted = []
+        raw.down = MagicMock(side_effect=lambda k: down_keys.append(k))
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock(side_effect=lambda t: inserted.append(t))
+
+        human_type(page, raw, "Hi Мир", cfg)
+
+        assert "H" in down_keys
+        assert "i" in down_keys
+        assert "М" in "".join(inserted)
+
+    def test_cjk_uses_insert_text(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        inserted = []
+        raw.down = MagicMock()
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock(side_effect=lambda t: inserted.append(t))
+
+        human_type(page, raw, "你好", cfg)
+
+        assert "".join(inserted) == "你好"
+
+    def test_mistype_only_ascii(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 1.0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        down_keys = []
+        raw.down = MagicMock(side_effect=lambda k: down_keys.append(k))
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock()
+
+        human_type(page, raw, "AБ", cfg)
+
+        assert "Backspace" in down_keys
+
+    def test_no_error_on_cyrillic(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+        raw.down = MagicMock()
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock()
+
+        # Should not raise
+        human_type(page, raw, "Тест кириллицы", cfg)
+
+
+class TestNonAsciiKeyboardAsync:
+    @pytest.mark.asyncio
+    async def test_async_cyrillic_uses_insert_text(self):
+        from cloakbrowser.human.keyboard_async import async_human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock, AsyncMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        inserted = []
+        raw.down = AsyncMock()
+        raw.up = AsyncMock()
+        raw.insert_text = AsyncMock(side_effect=lambda t: inserted.append(t))
+
+        await async_human_type(page, raw, "Привет", cfg)
+
+        assert "".join(inserted) == "Привет"
+
+
+
 # =========================================================================
 # SLOW TESTS — require browser (skipped in CI unless pytest -m slow)
 # =========================================================================

tests/test_update.py

@@ -20,6 +20,8 @@ from cloakbrowser.config import (
 )
 from cloakbrowser.download import (
     _check_wrapper_update,
+    _download_and_extract,
+    _fetch_checksums,
     _get_latest_chromium_version,
     _parse_checksums,
     _should_check_for_update,
@@ -474,3 +476,75 @@ class TestWriteVersionMarker:
             marker = tmp_path / f"latest_version_{get_platform_tag()}"
             assert marker.exists()
             assert marker.read_text() == "999.0.0.0"
+
+
+class TestDownloadFallback:
+    """Verify primary server (cloakbrowser.dev) → GitHub Releases fallback on HTTP errors."""
+
+    def test_binary_download_falls_back_on_http_error(self, tmp_path):
+        """HTTP error from primary triggers GitHub Releases fallback for binary download."""
+        with patch.dict(os.environ, {
+            "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+            "CLOAKBROWSER_DOWNLOAD_URL": "",
+            "CLOAKBROWSER_SKIP_CHECKSUM": "true",
+        }):
+            urls_called = []
+
+            def mock_download_file(url, dest):
+                urls_called.append(url)
+                if "cloakbrowser.dev" in url:
+                    raise Exception("HTTP 429 Too Many Requests")
+                # GitHub fallback succeeds
+                dest.write_bytes(b"fake")
+
+            with patch("cloakbrowser.download._download_file", side_effect=mock_download_file), \
+                 patch("cloakbrowser.download._extract_archive"), \
+                 patch("cloakbrowser.download._show_welcome"):
+                _download_and_extract()
+
+            assert len(urls_called) == 2
+            assert "cloakbrowser.dev" in urls_called[0]
+            assert "github.com" in urls_called[1]
+
+    def test_binary_download_no_fallback_with_custom_url(self, tmp_path):
+        """Custom CLOAKBROWSER_DOWNLOAD_URL disables GitHub fallback — error propagates."""
+        with patch.dict(os.environ, {
+            "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+            "CLOAKBROWSER_DOWNLOAD_URL": "https://my-mirror.com/releases",
+            "CLOAKBROWSER_SKIP_CHECKSUM": "true",
+        }):
+            with patch("cloakbrowser.download._download_file", side_effect=Exception("503")):
+                with pytest.raises(Exception, match="503"):
+                    _download_and_extract()
+
+    def test_checksum_fetch_falls_back_on_http_error(self):
+        """HTTP error from primary checksum URL triggers GitHub fallback."""
+        valid_checksums = (
+            "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+            "  cloakbrowser-linux-x64.tar.gz\n"
+        )
+
+        def mock_get(url, **kwargs):
+            resp = MagicMock()
+            if "cloakbrowser.dev" in url:
+                resp.raise_for_status.side_effect = Exception("HTTP 429")
+                return resp
+            # GitHub URL succeeds
+            resp.text = valid_checksums
+            resp.raise_for_status = MagicMock()
+            return resp
+
+        with patch.dict(os.environ, {"CLOAKBROWSER_DOWNLOAD_URL": ""}):
+            with patch("cloakbrowser.download.httpx.get", side_effect=mock_get):
+                result = _fetch_checksums()
+
+        assert result is not None
+        assert "cloakbrowser-linux-x64.tar.gz" in result
+
+    def test_checksum_fetch_returns_none_when_both_fail(self):
+        """Both primary and GitHub checksum URLs fail → returns None (skip verification)."""
+        with patch.dict(os.environ, {"CLOAKBROWSER_DOWNLOAD_URL": ""}):
+            with patch("cloakbrowser.download.httpx.get", side_effect=Exception("network error")):
+                result = _fetch_checksums()
+
+        assert result is None